The Bone Black Pigment Identification by Noninvasive, In Situ Infrared Reflection Spectroscopy

Figure 7

(a) Transmission spectra of vegetal (blue line) and animal black pigments (black line) compared to hydroxyapatite (grey line) standard; (b) enlarged view of the bone black spectrum highlighting the cyanamidapatite characteristic features.

(a)

(b)